i've had great experimental results using my ginger bug for other fruity/gingery sodas. i also like to use a lot more lemon than sandor's recipe calls for, and substitute some honey for the sugar. last week i happened across 4 pounds of strawberries and a bag of lemons, so i mashed up most of the berries in a gallon jug (cutting out the green and hard white bits, plus any brown spots), juiced about six of the lemons, added 1/4 c. of clover honey, and then topped it up with a quart of water that i'd boiled a few inches of ginger and 3/4 c. of white sugar in. once that cooled, i added in a few cups of my ginger bug and let it sit over night.
i bottled it all (mostly in mason jars and old gt kombucha bottles), and they VERY QUICKLY became fizzy. within a day, if we didn't very carefully let air escape while holding it outside, they would burst sending strawberry chunks everywhere. not exactly ideal for drinking in the car on the way to the coast, but it was so crisp and delicious, and everyone liked the strawberry pulp. i think it would work better served from a punch bowl, though, and i plan to make a similar drink as soon as our blackberries start fruiting.